I’ve had this for quite a while, before switching back to Proton from tuta. Proton of course has aliases, which would make Relay redundant, but Relay also gives you a phone mask which is very helpful to have and Proton doesn’t yet offer this.
One of the advantages of Relay is that it is agnostic of your email provider, making it easier to switch providers without having to change the email on every account that has an alias.
Considering this, I’d be tempted to go with Addy.io instead of ProtonMail / SimpleLogin (subsidiary of Proton AG).
If you’re concerned with having to trust a third-party to process your emails however, Proton may be the better option with built-in aliasing. Mailbox.org is another option recommended by privacy guides with built-in aliasing.
If you’re concerned with Mozilla’s TOS change however, you may also be concerned with the Proton CEO implicitly supporting the current Trump presidency, believing that the Republicans will do a better job reigning big tech in (While I’ll agree that the democrats are not anti-corp, that died with Bernie, I think it’s foolish to believe the republicans will be better). They also pulled their entire media presence on Mastodon, and recently integrated Zoom despite explicitly stating that it has privacy issues in their blog.
I think some people are being a bit extreme in their characterization of Proton AG right now, but it definitely feels like they’re making some peculiar choices when looking at their guiding mission of privacy / security.
I would be way more concerned about Proton than Firefox atm.
